There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 9AM to 3PM | 4AM to 12PM | 9PM to 1PM |
| 9AM to 9PM | 3AM to 9PM | 1PM to 2AM |
| 3PM to 1PM | 7PM to 8PM | 9PM to 4PM |
| 12PM to 9AM | 2PM to 10PM | 5PM to 7PM |
| 5AM to 9AM | 10AM to 11PM | 1PM to 11PM |
| 10PM to 5AM | 12PM to 1AM | 12PM to 3AM |
